Backpack power tool with a drive motor and a blower driven by the drive motor

• Main Authors: FLORIAN VON KRANE, CHRISTIAN BARTH, KIRSTEN SCHELLIN, CORNELIUS GINDELE
• Format: Patent
• Language: Chinese; English
• Published: 03.11.2017
• Subjects: BLASTING; CLEANING BEACHES; CLEANING OF PERMANENT WAYS; CONSTRUCTION OF ROADS, RAILWAYS, OR BRIDGES; DISPERSING; FIXED CONSTRUCTIONS; FOG IN GENERAL; HEATING; LIGHTING; MECHANICAL ENGINEERING; NON-POSITIVE DISPLACEMENT PUMPS; POSITIVE DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS; STREET CLEANING; WEAPONS

A backpack power tool has a backpack frame (3) that comprises a back plate (4) and a bottom plate (5). The bottom plate (5) comprises at least one hole through which working air is sucked by the blower (13) of the power tool from the bottom side (36) of the bottom plate (5) to the top side (35) of the bottom plate (5). Ribs (33, 34) extend on the bottom side (36) of the bottom plate (5) and have adhering faces (40) for sucked leaves at end sides (39) opposite to the top side (35). At least one inhalation hole (30) is arranged on the bottom side (36) of the bottom plate (5). Work airflow is sucked into the at least one hole by the blower (13) via the inhalation hole from an ambient enviroment. The at least one inhalation hole (30) is arranged between the end sides (39) of the ribs (33, 34) in the adhering faces and is connected with the at least one hole via a flow connection at the adhering faces (40) and facing the side of the blower (13). The power tool has an inhalation surface which is a total of the surf